package jianbo; /**
 * Created by xueal on 2018/1/12.
 */
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.concurrent.CopyOnWriteArraySet;

import javax.websocket.*;
import javax.websocket.server.ServerEndpoint;

import com.google.protobuf.InvalidProtocolBufferException;

import utgame.UtMessage.MessagePacket;
import utgame.UtMessage.MessagePacket.MessageType;
import utgame.UtMessage.MC_PlayerLogon;
import utgame.UtMessage.MS_PlayerLogon;

/**
 * @ServerEndpoint 注解是一个类层次的注解，它的功能主要是将目前的类定义成一个websocket服务器端,
 * 注解的值将被用于监听用户连接的终端访问URL地址,客户端可以通过这个URL来连接到WebSocket服务器端
 */
@ServerEndpoint("/websocket")
public class WebSocketController {
    //静态变量，用来记录当前在线连接数。应该把它设计成线程安全的。
    private static int onlineCount = 0;

    //concurrent包的线程安全Set，用来存放每个客户端对应的MyWebSocket对象。若要实现服务端与单一客户端通信的话，可以使用Map来存放，其中Key可以为用户标识
    private static CopyOnWriteArraySet<WebSocketController> webSocketSet = new CopyOnWriteArraySet<WebSocketController>();

    //与某个客户端的连接会话，需要通过它来给客户端发送数据
    private Session session;

    public static CopyOnWriteArraySet<WebSocketController> getWebSocketSet(){return webSocketSet;}

    /**
     * 连接建立成功调用的方法
     * @param session  可选的参数。session为与某个客户端的连接会话，需要通过它来给客户端发送数据
     */
    @OnOpen
    public void onOpen(Session session){
        this.session = session;
        webSocketSet.add(this);     //加入set中

        addOnlineCount();           //在线数加1
        System.out.println("有新连接加入！当前在线人数为" + getOnlineCount());
//        for(jianbo.WebSocketController item: webSocketSet){
//            try {
//                item.sendMessage("hello, xan");
//
////                item.session.getBasicRemote().sendBinary(ByteBuffer.wrap()); //发送二进制消息byte[]
//
//            } catch (IOException e) {
//                e.printStackTrace();
//                continue;
//            }
//        }
    }

    /**
     * 连接关闭调用的方法
     */
    @OnClose
    public void onClose(){
        webSocketSet.remove(this);  //从set中删除
        subOnlineCount();           //在线数减1
        System.out.println("有一连接关闭！当前在线人数为" + getOnlineCount());

        ClientSession clientSession = ClientSession.getInstance();
        String clientName = clientSession.getClientName(this);

        if (clientName == null) return;

        PlayerManager.getInstance().updateOnline(clientName, false);
        ClientSession.getInstance().removeClient(this);
        ClientSession.getInstance().broadcastPlayerOffline(clientName);
    }

    /**
     * 收到客户端消息后调用的方法
     * @param message 客户端发送过来的消息
     * @param session 可选的参数
     */
    @OnMessage
    public void onMessage(String message, Session session) {
//        System.out.println("来自客户端的消息:" + message);
        //群发消息
//        for(jianbo.WebSocketController item: webSocketSet){
//            try {
//                item.sendMessage(message);
//            } catch (IOException e) {
//                e.printStackTrace();
//                continue;
//            }
//        }
//        try {
//            MessagePacket messagePacket = MessagePacket.parseFrom(message.getBytes());
//            MessageType msgType = messagePacket.getType();
//            if (msgType == MessagePacket.MessageType.PlayerRegister)
//            {
//                PlayerRegister playerRegister = PlayerRegister.parseFrom(messagePacket.getMsg().toByteArray());
//            }
//        } catch (InvalidProtocolBufferException e) {
//            e.printStackTrace();
//        } catch (Exception e){
//            e.printStackTrace();
//        }
    }

    @OnMessage
    public void onMessage(byte[] message, Session session){

        String clientName = ClientSession.getInstance().getClientName(this);
        if (clientName == null) return;

        PlayerManager.getInstance().updateOnline(clientName, true);

        try {
            MessagePacket messagePacket = MessagePacket.parseFrom(message);

            PlayerManager playerManager = PlayerManager.getInstance();
            com.google.protobuf.ByteString send = playerManager.handleMessage(
                    ClientSession.getInstance().getClientName(this), message);

            if (send == null) return;

            // 登陆特殊处理
            if (messagePacket.getType() == MessageType.PlayerLogon){
                MS_PlayerLogon msPlayerLogon = MS_PlayerLogon.parseFrom(send);
                if (msPlayerLogon.getRet() == 0){
                    MC_PlayerLogon mcPlayerLogon = MC_PlayerLogon.parseFrom(messagePacket.getMsg());
                    ClientSession.getInstance().setClient(mcPlayerLogon.getName(), this);

                    ClientSession.getInstance().broadcastPlayerOnline(mcPlayerLogon.getName());

                    // 推送离线消息
                    ClientSession.getInstance().sendOfflineChat(mcPlayerLogon.getName());
                    playerManager.getInstance().removeOfflineChat(msPlayerLogon.getName());

                }
                sendMessage(messagePacket.getType(), send);
            }
//            sendMessage(messagePacket.getType(), send);

        } catch (InvalidProtocolBufferException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (Exception e){
            e.printStackTrace();
        }
    }

    /**
     * 发生错误时调用
     * @param session
     * @param error
     */
    @OnError
    public void onError(Session session, Throwable error){
        System.out.println("发生错误");
        error.printStackTrace();

//        jianbo.PlayerManager.getInstance().updateOnline(jianbo.ClientSession.getInstance().getClientName(this), false);
//        jianbo.ClientSession.getInstance().removeClient(this);
    }

    /**
     * 这个方法与上面几个方法不一样。没有用注解，是根据自己需要添加的方法。
     * @param message
     * @throws IOException
     */
    public void sendMessage(String message) throws IOException{
        this.session.getBasicRemote().sendText(message);
        //this.session.getAsyncRemote().sendText(message);
    }

    public void sendMessage(MessageType type, com.google.protobuf.ByteString message) throws IOException{

        MessagePacket.Builder builder = MessagePacket.newBuilder();
        builder.setType(type);
        builder.setMsg(message);

        this.session.getBasicRemote().sendBinary(ByteBuffer.wrap(builder.build().toByteArray()));
    }

    public static synchronized int getOnlineCount() {
        return onlineCount;
    }

    public static synchronized void addOnlineCount() {
        WebSocketController.onlineCount++;
    }

    public static synchronized void subOnlineCount() {
        WebSocketController.onlineCount--;
    }
}